MCP SysOperator

# LocalStack Compatibility This document outlines the compatibility of the AWS LAMP Stack infrastructure with LocalStack for local testing purposes. ## Overview [LocalStack](https://localstack.cloud/) is a cloud service emulator that runs in a single container on your laptop or in your CI environment. It provides an easy-to-use test/mocking framework for developing cloud applications. This project uses LocalStack to test the AWS infrastructure locally before deploying to the actual AWS cloud, saving time and costs during development. ## Supported AWS Services The following AWS services used in this project are supported by LocalStack: | AWS Service | LocalStack Support | Notes | |-------------|-------------------|-------| | EC2 | ✅ Partial | Basic instance operations supported | | VPC | ✅ Partial | Basic networking supported | | RDS | ✅ Partial | Basic database operations supported | | EFS | ✅ Partial | Basic file system operations supported | | ALB/ELB | ✅ Partial | Basic load balancer operations supported | | Route53 | ✅ Partial | Basic DNS operations supported | | IAM | ✅ Yes | Most IAM operations supported | | CloudWatch | ✅ Partial | Basic monitoring supported | | CloudTrail | ✅ Partial | Basic logging supported | | WAF | ✅ Partial | Basic web application firewall supported | | Auto Scaling | ✅ Partial | Basic auto scaling supported | ## Limitations When testing with LocalStack, be aware of the following limitations: 1. **EC2 Instances**: LocalStack doesn't actually run EC2 instances. It simulates the API but doesn't provide actual compute resources. 2. **RDS Databases**: LocalStack simulates RDS APIs but uses a local database engine instead of the actual AWS RDS service. 3. **EFS**: File system operations are simulated but don't provide actual distributed file system capabilities. 4. **Networking**: While VPC, subnets, and security groups can be created, actual network isolation isn't enforced. 5. **Load Balancing**: ALB/ELB APIs are simulated but don't actually distribute traffic. 6. **Auto Scaling**: The API is simulated but doesn't actually scale resources. 7. **WAF**: Rules can be created but aren't actually enforced. ## Testing Strategy Given these limitations, our testing strategy with LocalStack focuses on: 1. **Infrastructure Provisioning**: Verifying that Terraform can create all required resources without errors. 2. **Configuration Management**: Testing that Ansible playbooks run correctly against local resources. 3. **API Interactions**: Ensuring that our scripts correctly interact with AWS APIs. 4. **Resource Dependencies**: Verifying that resource dependencies are correctly defined. ## LocalStack Configuration The `test_with_localstack.sh` script configures LocalStack with the necessary services and endpoints. It sets up: 1. A local provider configuration for Terraform that points to LocalStack endpoints. 2. Environment variables for AWS credentials and region. 3. A local inventory for Ansible that simulates the AWS resources. ## Running Tests To run tests with LocalStack: 1. Start LocalStack: ```bash localstack start ``` 2. Run the test script: ```bash ./test_with_localstack.sh ``` The script will: - Initialize Terraform with LocalStack provider configuration - Apply the Terraform configuration to create simulated resources - Run Ansible playbooks against the local environment - Perform basic tests to verify the setup - Clean up resources (optional) ## Pro Version Features Some features used in this project may require LocalStack Pro, including: - Advanced VPC networking - Complex IAM policies - WAF rule enforcement - CloudTrail advanced logging If you encounter limitations with the community version, consider upgrading to LocalStack Pro for more comprehensive testing. ## Troubleshooting If you encounter issues with LocalStack testing: 1. Check LocalStack logs: ```bash localstack logs ``` 2. Verify LocalStack is running and healthy: ```bash curl http://localhost:4566/_localstack/health ``` 3. Ensure all required services are enabled in LocalStack. 4. Check that AWS credentials are set to the test values used by LocalStack.